#puzzle-container {
    display: grid;
    grid-template-columns: repeat(3, 100px);
    grid-template-rows: repeat(3, 100px);
    gap: 2px;
    background-color: #ccc;
    width: fit-content;
    margin: 50px auto;
}

.puzzle-piece {
    width: 100px;
    height: 100px;
    background-image: url('puzzle.jpg');
    background-size: 300px 300px;
    cursor: pointer;
}

#shuffle-button {
    display: block;
    margin: 20px auto;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
}